Having Berlin not directly on the Polish border is not really a priority, since there is no Cold War in this mod... and the section of Berlin (west Berlin) is imho too small to constitute a province.
Excellent job Hanni!
If you have the time, I suggest you continue with Poland. Its very linked with Germany, that would prevent to make connections for the old Polish map and then remake them with the new Polish map once its done too.
For Usti, well, no. It will be a '4 corners' I guess, like the one in Regensburg/Linz/Munich/Salzburg, another one in Augsburg/Nuremberg/Freiburg/Stuttgart, and Aachen/Munster/Arhnem/Eindhoven. You can go to the two directly connected but not to the one in diagonal.
For the dots, ports and cities:
I also included suggested IDs, to limit re-naming of provinces to the minimum. 'New' provinces need new IDs, they have '???' on them.
Edit: we don't really need the Kolding province. Merge it with Flensbrug and call it Flensbug. That saves ID 89, and was my initial intention.